import java.awt.*;         // Defines basic classes for GUI programming.
import java.awt.event.*;   // Defines classes for working with events.
import javax.swing.*;      // Defines the Swing GUI classes.


public class decoderApplet
extends JApplet implements ActionListener {
    Display display;  
    protected JTextField textField;
    protected JTextArea textArea;

   class Display extends JPanel {
        
      int colorNum;     
      Font textFont;    

      Display() {      
          super(new GridBagLayout());
         
          setBackground(Color.black);
         colorNum = 1;   
         textFont = new Font("Serif",Font.BOLD,36);


         textField = new JTextField(20);

        textArea = new JTextArea(5, 20);
        textArea.setEditable(false);
        JScrollPane scrollPane = new JScrollPane(textArea,
                                       JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                                       JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);

        //Add Components to this panel.
        GridBagConstraints c = new GridBagConstraints();
        c.gridwidth = GridBagConstraints.REMAINDER;

        c.fill = GridBagConstraints.HORIZONTAL;
        add(textField, c);

        c.fill = GridBagConstraints.BOTH;
        c.weightx = 1.0;
        c.weighty = 1.0;
        add(scrollPane, c);                
      }
      
      void encode() { 
         String text = textField.getText();
         String toInsert = "";
        for ( int i = 0; i < text.length(); ++i ) {
            char c = text.charAt( i );
            int j = (int) c;
            toInsert = new String(toInsert.concat(j + "-"));
        }
        textArea.append(toInsert + "\n");
        textField.selectAll();
        textField.setText("");
        textArea.setCaretPosition(textArea.getDocument().getLength());
         repaint(); 
      }

      void decode() {
          String text = textField.getText();
          String toInsert = "";
        String[] decoded = text.split("-");
        for(int i = 0; i < decoded.length; i++) {
            toInsert = new String(toInsert.concat(new Character((char)(new Integer(decoded[i]).intValue())).toString()));
        }
        textArea.append(toInsert + "\n");
        textField.selectAll();
        textField.setText("");
        textArea.setCaretPosition(textArea.getDocument().getLength());
          repaint();
      }

      public void paintComponent(Graphics g){            
         super.paintComponent(g);         
         g.setColor(Color.red);
         g.setFont(textFont);       // Set the font.
         g.drawString("Hello World!", 25,50);    // Draw the message.
      } 

   }    

   public void init() {
       display = new Display();

       getContentPane().add(display, BorderLayout.CENTER);

       JPanel buttonBar = new JPanel();
             
       buttonBar.setBackground(Color.gray);
       
       JButton bl = new JButton("Encode");

       bl.addActionListener(this);  
             
       buttonBar.add(bl);
       
       JButton bm = new JButton("Decode"); // the second button
       bm.addActionListener(this);
       buttonBar.add(bm);  

       getContentPane().add(buttonBar, BorderLayout.SOUTH); 

   }  // end init()


   public void actionPerformed(ActionEvent evt) {
      String command = evt.getActionCommand();
               
      if (command.equals("Encode"))       // Set the color.
         display.encode();
      else if (command.equals("Decode"))
         display.decode();

   }  // end actionPerformed()


} // end class HelloWorldJApplet